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Changes for page 3.5 Battery control

Last modified by Admin on 2025/03/10 12:50
From version 3.2
edited by Admin
on 2024/11/21 17:06
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To version 5.1
edited by Admin
on 2024/11/21 17:10
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62 62  
63 63  (% class="box infomessage" %)
64 64  (((
65 -**Note:** The allow charging relay closes under two independent conditions:
65 +**Note:** The "Allow charging" signal appears under two independent conditions:
66 66  1) the voltage on the cells reaches the Voltage to reset the “Ready to charge" level and
67 67  2) the "Delay before recharging" time has passed since the opening of the allow charging relay.
68 68  )))
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128 128  * Switch off the discharging relay on errors without delay – a flag to protectively open the discharging relay without delay. In the opposite case, when an error is detected, the discharging relay opens always with the delay “Delay before stopping discharging”.
129 129  * Precharge time – a duration of closing the precharge relay before closing the discharging relay, millisecond;
130 130  * Voltage to clear the “Ready to discharge” signal – a threshold voltage level on the cell, V; if the voltage of any cell is below this level, the “Ready to discharge” signal is cleared;
131 +* Voltage to reset the “Ready to discharge” signal – a tolerant voltage level on the cell, V; if all cells voltages are above the tolerant level, the “Ready to discharge” signal is set.
131 131  
132 -Voltage to reset the “Ready to discharge” signal – a tolerant voltage level on the cell, V; if all cells voltages are above the tolerant level, the “Ready to discharge” signal is set;
133 +== 3.5.3 Discharging (AUX) control ==
134 +
135 +The BMS Main 2.x board can control the power supply of external equipment using the auxiliary (AUX) discharging relay. An example of external equipment can be an inverter that converts DC to AC to power a service laptop and other devices.
136 +
137 +The power supply circuit of the external equipment using the auxiliary (AUX) discharging relay is independent of the battery load circuit. The closing and opening of the auxiliary (AUX) discharging relay is performed according to its program.
138 +
139 +If the power supply function of the external equipment is enabled, the auxiliary (AUX) discharging relay closes. The opening of this relay occurs on three independent conditions:
140 +
141 +* the battery has low SOC;
142 +* the battery voltage is out of range;
143 +* the battery system errors are detected.
144 +
145 +To change the parameters of the powering of external equipment, select the menu "Cells → Discharging (AUX) control":
146 +
147 +[[Discharging (AUX) control settings>>image:1732208939544-710.png||data-xwiki-image-style-alignment="center" height="397" width="445"]]
148 +
149 +In this section:
150 +
151 +* Enable – a flag to activate the auxiliary discharge control;
152 +* Switch off the discharging (AUX) relay at low SOC:
153 +** Minimum SOC – a minimum SOC value, when reached, the auxiliary (AUX) discharging relay opens, %;
154 +** Tolerant SOC – a permissive SOC value, upon reaching which the auxiliary (AUX) discharging relay re-closes, %;
155 +* Switch off the discharging (AUX) relay if the battery voltage is out of the range:
156 +** Minimum voltage – minimum battery voltage, V;
157 +** Maximum voltage – maximum battery voltage, V;
158 +* Switch off the discharging (AUX) relay on errors – the auxiliary (AUX) discharging relay opens if the following errors occur: Undervoltage, Overcurrent, High temperature (discharging), Short circuit, Critical error.
159 +
160 +== 3.5.4 Charging/Discharging control ==
161 +
162 +
163 +BMS Main 2.x allows to control charging/discharging contactor that combines algorithms of charging and discharging contactor. It behaves as charging contactor when «Charge request» or «Charger connected» are set, otherwise – as discharging contactor.
164 +
165 +To change the parameters of the charging/discharging algorithm, select the menu "Cells → Charging/Discharging control":
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